The logo should be modern and Minimalist. It should not focus on the aspect that we use sustainable materials, however it may in no case counteract this image.
We have a logo in mind that consists of some kind of symbol/animal/whatever and the text "eXvival" (preferably but not necessarily small capital letters, large X) below. For example, we really like the logo of "incylence" with the lynx above the font. The logo should work with and without font.